Smoke-consuming system.



Bi G. HATCHr SMOKE GONSUMING SYSTEM. APPLICATION FILED MAR. 7, 1911.

Patented June 10, 1913.

/5 I if 2 73 76 /3 IN VE N TOR 765%; @Q TORNEY nnwm-e. HATCH, or nnw .yo'nx; 1v,- Y.

SMOKE-CONSUMING SYSTEM.

Specification of Letters Patent.

1 '0 all whom it may concern:

Be it known that I, EDWI'N G. HAToH, of the city of New York, county of Kings, and State of New York, have invented a new and useful Improvement in fimoke-consuming Systems, of which 'the'followingis a full, clear, .and exact description.

My invention relates-to improvements in a system for consuming or at least reducing the unburned products of combustion as they issue fron the furnace of soot, cinders and. gases. As is well known, numerous attempts have been made to prevent the objectionable issuance of smoke and noxious gases, together with cinders, etc, from the stack of a furnace, and as is also well known, these schemes have been rather unsuccessful or impracticable, for the reason largely that conditions vary so much at the furnace, that is to say the varying conditions of draft, the occasion for innoxious gases. These attempts do not meet the requirements of varying cases,-

chiefly for the reason that it usually happens that there is insutlicient uncombined oxygen present ,to make possible complete combustion of the burner fuel, and further the oxygen used to consume the burnerfuelis made unavailable to burn the' objections able unburned products.

My invention contemplates the consumption 'of the objectionable materials in the products of combustion, the burning of-unconsumed combustible matter to colorless gases, and the promotion of draft in the stack, by not only supplying burners and combustible gaseous fuel at necess'aryinter-v vals in the path of the products of combustion, placed preferably at or just be yond the furnace proper,but further and chiefly by providing a large and regulable supply of heated air or oxygen sufliciently in excess of the amount required forthe complete combustion ofvthe gaseous or vain the form provements,

height, and

perature to make easy the combustion of the objectionable products issuing-from the furnace, and at the same time, byincreasing the temperature'of theproducts of combustion in the stack, render them much lighter than the outer air, thusgreatly increasing the draft, so that a. shorter stack can be efficiently used.

I further contemplate themaking available for useful purposes of much of the heat generated by the combustion of the usually objectionable matter, for when burners are placed near the furnace and make possible the'combustion oi the objectionable matter near the furnace,'much of the heatgenerated by such combustion is made available to heat the boiler or one or more economizers when economizers' are used. Ordinarily, the potential heat of the Patented June re, 1913.

- Application filed March 7, 1911. Serial No; 612,848,.

unburned matter emitted from the stack is.

lost and such loss of heat may amount toa very appreciable percentage of the possible ing out this idea itwill be obvious that varid heating power of thefuel used.' In carryous devices can be used for injecting the I supply of combustible "gaseous fuel ,mixed' and that the supply can be With heated air,

' provided at as many points between the fur mice and the open air as may be necessary.

I do not therefore limit my invention to any precise construction, though I show a practical means of carrying the invention into a eifect.

' Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views. y

Figurevl is a broken sectional elevation of an ordinary furnace provided with my imand Fig. 2 is a sectional plan showingthe arrangement of mixers on line 22 of Fig. 1.

The stack 10 of the furnace 20 can obvi ously be of any approved construction and Along the stack I lead main pipes 11 which can convey an draft of heated air to the burnwhic when mixed withoxygen orxair may be ignited and burned. Means is provided. for supplying the air either at atmospheric the burners and may be of brick, iron, or otherand I also by means of main pipes 12,

pressure: from the air inlet 19 or at such I lieve usually inadequate to maintain proper pressure as may be required from'the compressor 17, this o f-course varying with different furnace conditions, and I also call attention to'the fact that while the air supply pipes may be on the exterior of the stack, they can be as 'well arranged in the interior as shown, "thereby keeping the air heated more easily than if they are exposed to the weather. This, however, does not affect the principle of the invention. As a matter of convenience I show the pipes 11 and 12 connecting with circular branch pipes 11 and 12, which encircle the stack and which connect at necessary intervals with the mixing 7 chambers 13 in which the gas and air may be mingled, while issuing fromthese mix- .ers' are jet pipes 15 which project'through openings 1% in the stack-and terminate in nozzles 16 which may be of any approved kind'and adapted to serve the purpose of projecting the mixture of combustible gas or vapor and air into the path of the products of combustion of the furnace, in substant-ially the same plane inside the stack.

I wish it distinctly understood that the particular arrangement shown while being practical and well adapted for the purpose, is not absolutely essential, and I wish it further understood that the system-of injecting heated air and combustible gaseous fuel, can be located at as many points as may be desirable, and at any particular place along the path of the products of combustion from the furnace to the open air. It is, however, desirable, and I consider it necessary, to have the arrangement such as shown in the drawings to avoid any structures extending across the path of the furnace draft, as such structures interfere with the, draft, collect soot, are inaccessible, and are generally objectionable.

Where luirncrs have been used in the draft of a furnace, they have, so far as 'I know, depended for their air supply' on the 'air in the draft, and this is often, and I berender them colorless and innocuous so that no noticeable smoke and no great amount of deleterious gases will issue from the stack. 7

I claim The combination of a furnace of the type burning a primary fuel and having a fuel bed, a combustion chamber and a draft flue terminating atthe outlet to atmosphere of the stack or chimney, and smoke consuming and draft accelerating apparatus applied to said draftflue and comprising a series of burners arranged to discharge in substantially the same plane inside of said draft flue intermediate the fuel bed and the outlet of the draft flue to atmosphere, without obstructing the draft, separate and independent main air pipes and main auxiliary fuel pipes extending from the base of the draft flue to points in proximity to said burners, a plurality of branch pipes partially encircling the stack and connecting said main independent air and fuel pipes to the burners for separately supplying fuel and an ac celerated draft of air to the burners and mixing the air and fuel at the burners,

means for supplying a regulable accelerated draft of air under pressure to the air pipes and means for supplying a regulable quantity of gaseous or Vaporous fuel to the auxiliary fuel pipes.

lVitnesses:

THOMAS T. SEELYE, ARTHUR G. DANNELL.

Copies of this patent may be obtained for, five cents each, by addressing the Commissioner of Patents,

- Vii'ashtngton, D. C.

EDWIN e. HATCH] 

